JerryandSusie wrote:
I just purchased a 2017 Ram 2500 Cummings Diesel. My owners manual says that when I come off the highway I should let my engine idle for 5 minutes and if I'm city driving 1 minute of idle should be enough before shutting it off.
I think you will find that they mean you can’t pull off the highway, like into a rest area, and just shut it off, it needs to cool down.
In other Cummins publications they make this more clear, stating that a slow easy drive a few minutes off the highway is plenty of cool down.
